Removal of excess coating material from coated articles



Oct. 30 1923. 1,472,228

c., L. PEIRCE, JR

REMOVAL OF EXCESS COATING MATERIAL FROM COATED ARTICLES FiledMarch 11.1920 2 Sheets-Sheet 1 Hill. 8

I 1 o I i o /4 M" E /A 2 1 5 E 1:: 6 E) 9Y J fl [g ib WITNESSES C 3 2 91 O 3 d O REMOVAL OF EXCESS COATING MATERIAL FROM COATED ARTICLES 2Sheets-Sheet 2 Filed Ma rqh FH3.Z.

wrmzssss Patented Get. 30, 11923.

enemies L. PEIRCE, an,

res

c" o a hei hten 1W1? ca is li a o F PITTSBURGH, PENNSYLVANIA,.AlSSIGiNOR O33 ONE-HALF OF PENNSYLVANIA.

REMOVAL 0E EXCESS COATING MATERIAL FROM CDA'IED ARTICLES.

Application filed March 1 1, 1920. Serial No. 365,001.

' tion of a simple, effective and commercial method of removing excesscoating material from bulky articles, such as rods, pipes or plates,which have been coated by the application of liquid coating material.

A further object is to produce a simple and eliective' method forremoving excess galvanizing material from bulky articles, which havebeen coated by the hot'galvani'zing process. a

These and other objects, which will be made more apparent throughoutthefurther description of the invention, are attained by means of themethod herein describedas an embodiment of the invention.

In the drawings accompanying and forming a part hereof, Figure 1 is anend elevation of apparatus which may be employed in carrying out myinvention. Figure 2 is a side elevation of the apparatus shown in Figure1, portions being shown in section and broken away for convenience ofillustration.

It is customary in galvanizing articlesby the hot dip galvanizingprocess to submerge them in a bathof molten galvanizing material. Wherethe articles are bulky such as plates, rods or pipesrany suitable meansmay be employed for sosubjecting them to the bath that the entiresurface of each article is subjected to the coating actions ofthejba'th.

It will be apparent that such articles are subjected to and do take upheat from the bath and that-excess coating material adhering to themremains in a molten condition for an'appreciable time after the articlehas been subjected to the bath. The period of timeduring which theexcess material 're mains in the molten state "dep'ends some in a liquidAn object of the invention is the producwhat upon the size of thearticle, the length of time it is subjected to the molten bath, thetemperature of the bath and the atmospheric temperature. This, however,is only incident to my invention, since with my invention, the removalof the excess material is accomplished immediately after the coatedarticles are withdrawn from the bath, while they are still hot, andwhile the excess material is still in a molten state. The articlesremoved from the bath of molten metal may be suspended over the bath ofmolten metal in such a way that they are capable of swinging freelyat-least within certain limits. They are then subjected to a hammerlikeblow of sufiicient velocity and force to cause them to swing with a highor projectile like velocity against a stationary or substantially rigidabutment or anvil, so arranged in the path of the articles that itabruptly or instantaneously checks themotion imparted to them by theblow.

In the drawings I have illustrated apparatus which may be employed incarrying out the invention. As ilhlistrated, a receptacle 3 is providedat one edge with a substantially rigid upright 4 forming a support foran abutment or anvil mounted thereon and as shown cxtends'horizontallyand is located some distance above the upper edge of the receptacle. Aswinging hammer or striker 6 is so located with relation to the abutmentthat it is capable of being moved at a high velocity into con tact withthe articles, such as rods it suspended between the striker and theabutment.

5, which suit-ably i As shown in the drawings, the striker consists of along cylindrical weight rigidly secured to two pivotally mounted rods 7to which an'impclling force u'iaybe imparted by any suitable means. Inthe drawings, one rod 7 is shown provided with an integrally formedpower arm 8 which extends substantially at right angles to the rod andis adapted to be actuated by a :lootlevcr 9 through the agency of a link10 Each of "the rods 7 is shown provided with a coun- 'ter-balancingweight 11 and each is provided with several mounted apertures '12 Forthe striker, so that the striker-may he moved to different longitudinalpositions with re The rods are o3? such lation to the rods.

length that their fulcrum points are located well above the abutment 5,and they areof such length 'with'relation'to the power arm to theceiling or roof structure of the building in which the receptacle 3 islocated. It will be apparent that a single counterweight may replace thetwo counter-weights ll shown in Figure 2 and that it may be mounted onthe shaft 13 independently of the rods. i

By employing a relatively long striker 6 and a relatively long abutment5,, theroperating'mechanism of the striker. maybe so located withrelation to the receptacle that it will not interfere with nor preventtheuse of suitable suspending devices for the articlesacted upon. Forexample, such articles may be suspended by means of a crane V or merelyby means of a pulley 17 and or'cable 18. The cable chain 18.

As shown'in the drawings, I preferably employed .a rack 20 capable ofreceiving a number of rods A and of suspending them in the desiredposition. The rack shown consists of two fiat steel bars 21 spaced bymeans of pipesections 22 and provided with supporting arms 23 which maybe engaged by a supporting hook secured to the chain 18 passes over thepulley. 17 and its free end may be secured to any rigid support in theusual manner.

As shown in the drawings, the upright i is provided with severalapertures 15 which may be employed in mounting the abutment in differentpositions along it. 7 provided with an imperforate plate 16 spacedawaysfrom the abutment and adapted to'form a shield for catchingexcesscoat- Ting; material removed from articles striking :the'abutment. Itmay also be so lo cated that the material thus removed will drop intothereceptacle 3. i

r In carrying out my invention, the freshly coated articles aresuspended between the mabutment and the striker while hot and vvhile'thecoating material is still in a molten state. The striker is then movedagainst the'article or articles so suspended with suiiicient velocityand with sufiicient force to strike the articles a projectile like blow:of such intensity that the article or articles T j are projected withahigh velocityfagainst and intensity, in so It'Ii's also I at a highvelocity .t 2., The metho d the abutment. :Under such conditions, theimpact to which the articles are subjected rial. Such excess material asremainson the article at the time of impact with the abutment is shedfrom the article by the force. ofthat impact.

It will be apparent that the'weight and velocity of the striker and itsposition with must be relation to the suspended articles Suchthat it iscapable of abruptly accelerating the articles at the time ofimpact withcauses them to shed the excess coating matethem, so that the articlesarecaused to swing at a high velocity. must also be so proportioned that itwill in stantaneously accomplishthe result above described and will domore than set up vibrations or local displacement of the ar ticles. Incarryingoout my invention '1 have found that under certain conditions,the abutment may be dispensed with, since the The force imparted hammerblow of the striker is suificient to:

remove excess materiah The use of the abutment, however, is advantageousin that it insures a thorough removal of the excess -material and,bylimiting the swing of the articles struck by the striker, simplifies theprocedure after the'excess material has been removed. After the articleshave been treated ascabove described, they are removed from theirsuspended positionin any suitable way.

While I have describedbut one method embodying my invention andwhile'Ihave illustrated and described but one form of apparatus forcarrying out the same, it will be apparent that various changes,additions and modifications may be made both in'the .method andin'theapparatus without departing from the spirit and'scope of themventionassetforth by, the appended claims.

What I claim is: i a

1. The method of removing excess coating material from an article coatedwith liquid coatingmaterial, which consists in suspending the coatedarticle, so that itis capable.

in striking it a blow of such of swinging, force that thesuspendedarticle is projected rigidabutment. V .7 v of removing excessgalagainst a substantially vanizing material from" an articlecoated by:

thefhot dip process, which consists in suspending. the galvanizedarticle, and subj ecting it while'hot and-while the excess material isin a molten state, to a projectile like blow "ofsufiicient force andmagnitude to q p'rojectthe suspended ,bodyaga'inst an abutment. Y 1 3.An'apparatus ,for removing excess; coating material froman articlecoated with ia'liquid coating comprising an abutment, a 1 strikersecuredto alongpivotally. mounted 1 7 rod, means for suspendinga coatedarticle .be weenpt utm ntfa d. the strike! a d m 5 vanizing materialfrom means for swinging the striker against the suspended article with aprojectile like velocity.

4a. The method of removing excess galvanizing material from an articlecoated by the hot dip process, whichconsists in suspending thegalvanized article, and subjecting it while hot to a projectile-likeblow at a point intermediate its ends and of sufficient force andmagnitude to project the body laterally at a velocity approximatelyequal to the velocity of the blow-striking implement.

5. An apparatus for removing excess galan article coated by the hot dipprocess, comprising means for suspending the article from one end sothat it is free to swing, a striker, of a mass comparable with that ofthe article, secured to a relatively long, pivotally mounted rod, andmeans for moving the rod about its pivot point to impel the striker intocontact with the article at a projectile-like velocity.

. An apparatus for removing excess galvanizing material from articlescoated by comprising means for the hot dip process, suspending thecoated article from one end, so that the other end is free, a striker ofa mass comparable with the mass of the article, a relatively longpivotally mounted rod on which the striker is mounted, and a pedalactuated motion multiply device for swinging said rod about its pivotpoint.

In testimony whereof, I have hereunto subscribed my name this 9th day ofMarch, 35

CHARLES L. PEIRCE, JR.

